Google +1 buttons help visitors recommend a website's content on Google Search and on their Google Profiles. Google has just announced a few changes that make +1 even more useful.

First, the +1 button now lets visitors share links to your pages on Google+. If someone wants to start a conversation about your content, it's easy for them to do so.

Second, you can use +Snippets to customize the name, image and description that appear when your content is shared. +Snippets let you put your best face forward by customizing exactly what appears when your content is shared. For example, if you?re running a movie review site, you might want visitors to share posts containing the title, movie poster, and a brief synopsis.

Finally, new inline annotations help increase engagement after users see a friend's recommendation right on your page. Now, when a person visits a page that someone they know has +1'd, they can see a name and face reminding them to pay special attention to your content. Here?s how it looks:

To add inline annotations, you need to update your +1 button code.

Both sharing from +1 and inline annotations are rolling out fully over the next few days, Google said.